Eleven Mile Solar Center
Eleven Mile Solar Center is a battery storage plant in Pinal County, Arizona, operated by Eleven Mile Solar Center, LLC. Among the 605 battery storage plants in the country it is the fourth-largest. It is the biggest of Arizona’s 34 battery storage plants. Of its current capacity, 600 MW came online between 2023 and 2025.
Nameplate capacity, 2025
600 MW
600 MW net summer capacity
2 operable units
- Battery300 MW50%
- Solar photovoltaic300 MW50%
Unit by unit, 2024 to 2025
operating in 2025bar height follows unit size
Unit 1111 Solar photovoltaic, 300 MW, 2024
Unit 2222 Battery, 300 MW, 2024
Among Arizona’s plants
Largest plants in the state by nameplate capacity, with the plants ranked next to this one.
- 1Palo Verde4,210 MW
- 2Springerville1,779 MW
- 3Santan1,326 MW
- 24Gila River Power Block 3619 MW
- 25Gila River Power Block 4619 MW
- 26Eleven Mile Solar Centerthis plant
- 27Harquahala 2600 MW
- 28Sun Streams 4600 MW
Other rankings
- All US power plants
- 604th of 14,286
- Power plants in Arizona
- 26th of 191
- Plants in the Salt River Project balancing area
- 15th of 44
- Biggest single unit, among Arizona’s plants
- 11th of 191
Operable units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1111 | Solar photovoltaic | 300 MW | 300 MW | 2024 | Operating |
| 2222 | Battery | 300 MW | 300 MW | 2024 | Operating |
Grid and site
- Balancing area
- Salt River Project
- Reliability region
- Western Electricity Coordinating Council
- Highest grid connection voltage
- 230 kV
- Nearest town on record
- Coolidge
- Operator type
- Independent producer
- Coordinates
- 32.861°N, 111.592°W
Closest plants
| Plant | Runs on | Capacity | Distance |
|---|---|---|---|
| East Line Solar | Solar | 100 MW | 1.8 mi southeast |
| Central Line Solar, LLC | Solar | 100 MW | 2.3 mi southeast |
| Pinal Central Energy Center Hybrid | Solar | 30 MW | 2.6 mi northeast |
| Saint Energy Storage II LLC | Battery storage | 100 MW | 4.5 mi east |
| Sundance | Natural gas | 695 MW | 4.7 mi north |
| Saint Solar | Solar | 100 MW | 5.2 mi east |
| Storey Solar and Storage | Solar | 210 MW | 5.8 mi east |
| Coolidge Generation Station | Natural gas | 726 MW | 6.5 mi northeast |